how to say NO to a persistent suitor?

what do you do when a guy keeps bugging you to go out or bombarding you "what you doing?" texts? not to offend him and to avoid embarrasment? i know its not easy telling someone you don't like. i don't also want to use him as an ego boost just because i want someone running after me? what should i do?

I guess thats really a tough one..
But nowadays, i seldom see such persistant suitor, or at least it doesnt happens to me, unless im single... If not, they will buzz of themselves upon knowing im attached...
Keke... How the reality works ya...
Perhaps u can hint them?
If not, ignore the text msgs?
I guess worse to worse, u gotta let them noe that u r not interested instead of them thinking that u are shy or that they stand a chance?
I mean yah, we should be tactful so as not to hurt others too, right?
Karma does happens and we wouldnt want such hurting things to happen on us too, dont we?
Try talking to him...
But i guess if u tell him, i really treat u as a friend, or even brother, they will get the hint..
if not, tell them..
U are really nice, but we are not that suitable?
=)
Very cliche lines...

Some days ago i posted similar discussions about undesired flirts and how to refuse them without to hurt.
One inteligent person can allways make the difference between persistency and intrusion.In fact he intruses you.And sometimes our politeness makes people like this to misunderstand you, to keep false hopes that something will change. It`s better to be frank. Not to be rude, just to be frank and to tell him that his behavior is not desired.